Internet Database of Periodic Tables
There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
Use the buttons below to select from the 1000+ Periodic Tables in the database:
Where Your Elements Came From Periodic Table
- The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe.
- The carbon in your body was made by nuclear fusion in the interior of stars, as was the oxygen.
- Much of the iron in your body was made during supernovas of stars that occurred long ago and far away.
- The gold in your jewelry was likely made from neutron stars during collisions that may have been visible as short-duration gamma-ray bursts.
- Elements like phosphorus and copper are present in our bodies in only small amounts but are essential to the functioning of all known life.
The featured periodic table, from Astronomy Picture of The Day (APOD) is color coded to indicate humanity's best guess as to the nuclear origin of all known elements. The sites of nuclear creation of some elements, such as copper, are not really well known and are continuing topics of observational and computational research.
Thanks to Marcus Lynch for the tip!
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© Mark R. Leach 1999-
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